Below is every ingredient in Lakme 9 To 5 Vitamin C Serum explained, its standout actives, and the side effects reported in research for those actives — analysed for Indian skin.
Flags derived from the ingredient list using dermatology reference data (fungal-acne substrate, comedogenicity, EU allergens). General guidance, not a diagnosis.
Answers are derived from the printed ingredient list and dermatology reference data — general guidance, not a diagnosis or a therapeutic claim.
3-O-Ethyl Ascorbic Acid is a stable, water-soluble ethylated derivative of vitamin C that converts to ascorbic acid in the skin, providing antioxidant protection and supporting collagen synthesis and pigmentation control. It is valued for greater stability than pure L-ascorbic acid while delivering similar brightening and anti-aging benefits.
Tocopheryl acetate is a stable, esterified form of vitamin E used in skincare as an antioxidant and conditioning agent. It is converted to active tocopherol in the skin, helping protect against oxidative stress and supporting the skin barrier.
Terminalia Ferdinandiana (Kakadu plum) fruit extract is an exceptionally rich natural source of vitamin C (ascorbic acid) along with ellagic and gallic acids, valued in skincare for antioxidant protection and potential brightening effects. It helps neutralize free radicals and may support collagen-related processes when stabilized in formulations.
Aggregated from the active ingredients in this product.
| Reported effect | How often | Notes |
|---|---|---|
| Skin dryness or barrier disruption with excessive contact | Uncommon | Frequent or prolonged exposure to water, especially hot or hard water, can disrupt the skin barrier and contribute to transepidermal water loss. |
| Irritation from impurities or hard water minerals | Rare | Reactions are attributed to contaminants, chlorine, or mineral content rather than water itself. |
| Mild stinging or tingling | Uncommon | More likely at higher concentrations or on sensitive or compromised skin. |
| Transient erythema (redness) | Uncommon | Usually temporary and resolves after discontinuation or lowering concentration. |
| Dryness or irritation | Uncommon | Can occur with frequent use or in combination with other actives. |
| Allergic contact dermatitis | Rare | Hypersensitivity reactions are infrequently reported. |
| Mild skin irritation | Uncommon | Transient stinging or redness, more likely on compromised or sensitive skin. |
| Enhanced penetration of co-formulated irritants | Uncommon | As a penetration enhancer it may increase absorption and irritation potential of other actives. |
| Mild transient stinging or irritation | Uncommon | More likely on compromised or sensitive skin, especially at higher concentrations. |
| Skin dryness or tightness | Rare | Possible with high concentrations in leave-on products. |
| Redness or erythema | Uncommon | Typically mild and resolves after discontinuation. |
| Contact dermatitis / allergic reaction | Very rare | Allergic sensitization is uncommon; reactions may relate to residual monomers or other formulation components. |
| Temporary tightness or dryness | Uncommon | Film-forming effect can produce a sensation of skin tightness in some users. |
| Contact urticaria | Very rare | Isolated reports of immediate hypersensitivity reactions. |
| Eye irritation | Uncommon | Can cause irritation on direct contact with eyes, relevant in eye-area products. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
| Ingredient | What it does |
|---|---|
| Water Solvent/vehicle | Water is the most common base ingredient in cosmetic formulations, serving as a solvent that dissolves other ingredients and forms the bulk of emulsions and aqueous solutions. It is generally considered safe and non-irritating. |
| 3-O-Ethyl Ascorbic Acid Key active Antioxidant / brightening vitamin C derivative | 3-O-Ethyl Ascorbic Acid is a stable, water-soluble ethylated derivative of vitamin C that converts to ascorbic acid in the skin, providing antioxidant protection and supporting collagen synthesis and pigmentation control. It is valued for greater stability than pure L-ascorbic acid while delivering similar brightening and anti-aging benefits. |
| Propanediol Humectant/solvent | Propanediol is a plant-derived glycol used in skincare as a humectant, solvent, and penetration enhancer that improves moisturization and the spreadability of formulations. It also helps solubilize other ingredients and can boost the efficacy of certain actives. |
| Pentylene Glycol Humectant / solvent / preservative-booster | Pentylene glycol is a glycol used in cosmetics as a humectant and solvent that also enhances the antimicrobial efficacy of formulations, helping reduce reliance on traditional preservatives. It improves skin hydration and aids the delivery and stability of other ingredients. |
| Sodium Acrylates Copolymer Thickener / film-forming stabilizer | Sodium Acrylates Copolymer is a synthetic anionic polymer used to thicken, stabilize, and improve the texture of cosmetic formulations, often forming a smooth film on the skin. It functions primarily as a rheology modifier and emulsion stabilizer rather than a treatment active. |
| Phenoxyethanol Preservative | Phenoxyethanol is a widely used broad-spectrum preservative that protects cosmetic and skincare formulations from bacterial and fungal contamination. It is typically used at concentrations up to 1% and serves as a formulation/base ingredient rather than an active treatment. |
| Lecithin Emollient / Emulsifier | Lecithin is a naturally occurring phospholipid (commonly derived from soybean or egg) used in skincare as an emulsifier, emollient, and penetration enhancer. It helps stabilize oil-and-water formulations and supports the skin barrier by mimicking natural lipids. |
| Tocopheryl Acetate Key active Antioxidant | Tocopheryl acetate is a stable, esterified form of vitamin E used in skincare as an antioxidant and conditioning agent. It is converted to active tocopherol in the skin, helping protect against oxidative stress and supporting the skin barrier. |
| Fragrance Fragrance/masking agent | Fragrance refers to a blend of natural or synthetic aromatic compounds added to skincare products to impart a pleasant scent or mask the odor of other ingredients. It serves a sensory and formulation purpose rather than a therapeutic one. |
| Glycerin Humectant | Glycerin is a widely used humectant that attracts and retains water in the skin, helping to hydrate the stratum corneum and support barrier function. It is considered safe and well-tolerated across most skin types and concentrations. |
| Sodium Gluconate Chelating agent / skin-conditioning | Sodium gluconate is the sodium salt of gluconic acid used in skincare primarily as a chelating agent to bind metal ions and stabilize formulations, with secondary humectant and skin-conditioning properties. It is generally considered a base/formulation ingredient rather than an active treatment. |
| PEG-4 Laurate Emulsifier/surfactant | PEG-4 Laurate is a polyethylene glycol ester of lauric acid used in cosmetics as a nonionic emulsifier, surfactant, and emollient that helps blend oil and water phases and improve product texture. It is a formulation/base ingredient rather than a therapeutic active. |
| PEG-4 Dilaurate Emulsifier/emollient | PEG-4 Dilaurate is a polyethylene glycol ester of lauric acid used as a nonionic emulsifier and emollient to stabilize oil-in-water formulations and improve skin feel. It serves as a base/formulation ingredient rather than a therapeutic active. |
| Iodopropynyl Butylcarbamate Preservative | Iodopropynyl Butylcarbamate (IPBC) is a broad-spectrum antimicrobial preservative used in cosmetics and personal care products primarily to protect against fungal and bacterial contamination. It is typically used at very low concentrations within regulatory limits. |
| Polyethylene Glycol Humectant/emollient & solvent | Polyethylene Glycol (PEG) is a versatile petroleum-derived polymer used in skincare as a humectant, emollient, solvent, and surfactant base that improves texture, hydration, and ingredient delivery. It is considered a formulation ingredient rather than a treatment active. |
| Terminalia Ferdinandiana Fruit Extract Key active Antioxidant | Terminalia Ferdinandiana (Kakadu plum) fruit extract is an exceptionally rich natural source of vitamin C (ascorbic acid) along with ellagic and gallic acids, valued in skincare for antioxidant protection and potential brightening effects. It helps neutralize free radicals and may support collagen-related processes when stabilized in formulations. |
| Limonene Fragrance/solvent | Limonene is a naturally occurring monoterpene derived from citrus peel oils, commonly used as a fragrance component and solvent in cosmetic formulations. On exposure to air it oxidizes, forming compounds with greater sensitizing potential. |
| Linalool Fragrance/masking agent | Linalool is a naturally occurring terpene alcohol found in lavender, coriander, and many other plants, used in skincare primarily as a fragrance component. It readily oxidizes upon exposure to air, forming sensitizing hydroperoxides. |
| Geraniol Fragrance/aroma compound | Geraniol is a naturally occurring terpene alcohol used in cosmetics primarily as a fragrance ingredient and for its pleasant rose-like scent. It also has mild antioxidant and antimicrobial properties but is included mainly for olfactory rather than therapeutic purposes. |
| Citronellol Fragrance ingredient | Citronellol is a naturally occurring monoterpene alcohol used as a fragrance and flavoring agent, providing a rose-like, citrusy scent in cosmetics and personal care products. It is found in essential oils such as rose, geranium, and citronella. |
| Citral Fragrance/aroma ingredient | Citral is a naturally occurring aldehyde found in citrus and lemongrass oils, used in cosmetics primarily for its fresh, lemon-like scent. It is a recognized fragrance allergen rather than a treatment active. |
Key active = does the main work. Ingredient explanations are drawn from public databases & literature.
Peer-reviewed papers on the active ingredients in this product, via PubMed.